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Feb. 14, 1928.

w. H. GRADY EXTENSION ARM FOR TRAMCARS Filed April 21, 1927 dwoz n 0,134

Patented Feb. 14, 1928.

UNITED STATES PATENT OFFIQE.

WILLIAM H. GRADY, OF IIOUISVILE, KENTUCKY, ASSIGNOR, BY MESNE ASSIGNMENTS,

TO AMERICAN GREOSO'IING COMPANY, OF LOUISVILLE, KENTUCKY, A CORPORA- T101? OF DELAWARE.

EXTENSION ARM FOR TRAMCARS.

Application filed April 21, 1927. Serial No. 185,502.

This invention relates to an improvement in holster arms for tram cars employed 1n connection with wood impregnating plants. Cars of this type are used principally for hauling wood railroad ties and include generally end sills having the ends thereof curved upwardly and outwardly to retaln the timber in position, and serving as guides in piling the timber on the car.

The impregnation of the wood t1mbe rs, particularly railroad tree, is done in cyllndrical treating chambers, the tram cars being run into these chambers while loaded. It is therefore necessary that the t mbers be loaded on such cars so as to conform generally to the shape of the cylindrical treating chamber, and to hold the timbers in place it is customary to use a curved ba l attached to the bolster arms. Such aball is shown and described in patent to Cook and Austin 1,428,474, Sept. 5, 1922.

These same tram cars are used in haullng the ties from the storage yard to points other than the treating cylinders, such as the adzing and boring shop, and it is an ob ect of this invention to materially increase the carrying capacity of these tram cars when so used.

This object is attained by the use of extension arms for detachable connection to the upwardly extending bolster arms of the cars.

Another object of this invention is to so construct the extension arms that they may be slipped on and off the ends of the bolster arms but will be none the less rigidly and firmly held to the bolster arms without the use of bolts or pins.

These and other objects will be apparent from the following description taken in connection with the accompanying drawings, wherein Fig. 1 shows in elevation a portion of a tram car with two extension arms attached.

Fig. 2 is a section on line 2-2.

Figs. 3 and 1 are perspective views of the extension arm.

Referring to the drawings, there is illustrated in Fig. 1 a portion of a tram car, such as is commonly used in wood impregnating yards, see for example Patent No. 1,028,? 68, Moore, patented June 4, 1912.

The sill 2 has two upwardly extending curved arms 3, 3, and an extension arm at is shown as attached to these arms. In

,made by bending a metal strap to form an open-ended box-shaped member, having two parallel sides 6 and 7. One of these sides 7 is riveted to the, face 8 of the extension arm 1, the remaining sides thereof being spaced from said extension arm, as shown, to permit the entry of the upper end of the angle iron bolster arm into this space.

The opposite parallel side 6 of said socket is extended, at 9 and is bent back into contacting engagement with. the arm and is secured thereto at 10, as by rivets. By this construction, it will be seen that the socket 5 is rigidly and securely fastened to the extension arm but is spaced therefrom on three sides.

Since the upwardly extending bolster arms 3 are curved inwardly, the socket takes a position thereon as seen in Figs. 1 and 2. That is, the side marked 11 rests against one outside face of the bolster arm, and the innermost tip of the bolster arm contacts with the face 6 of the socket, as in dicated at 12. The bolster arm is provided with a stop 1.3 for engagement with the end of the extension arm.

lVhen the socket is slipped over the end of the bolster arm, the extension arm 4 provides a rigid outwardly flaring elongation. thereof. No fastening bolts or pins are necessary, and the time and labor involved in attaching them to and detaching them from the tram cars is reduced to a minimum.

By the use of these extension arms, the number of ties which can be carried by a car is largely increased, and the loading of the cars by cranes or derricks from the piles of ties in the yard is facilitated.

I claim:

1. A timber car for wood impregnating cylinders including upwardly and outwardly extending bolster arms and removable extension arms for said bolster arms, said extension arms each comprising a beam member, and a socket thereon for engagement over the endof the bolster arm, said socket being secured to one face of said beam member.

2. The structure as said socket comprises shaped member.

3.'The structure as in claim 1 wherein said socket comprises an open-ended box' shaped member, two opposite sides of said box member being secured to said beam member.

41-. The structure as in claim 1 wherein the bolster arms comprise curved angle irons, and one face of said beam member engages one inner face of said angle iron.

5. The structure as in claim 1 wherein the bolster arms comprise curved angle irons and said socket comprises an open box member having two of its sides forming substantially aright angle, one of said sides en gaging said curved angle iron only at the in claim 1 wherein an open-ended boxend thereof.

6. The structure as in claim 1 wherein a stop is provided on said bolster arms for engagement with said extension arm.

7. An extension arm adapted for engagement' with the bolster arm of a wood impregnating car comprising a beam, and a socket secured thereto, said socket comprising an open-ended box, one side of said box beingsecured to one face of said beam, the

9. Anextension arm adapted for engagement'with the bolster arm of a wood impregnatingcar comprising a beam, and a sot-,lcet secured thereto, said socket comprising an openendod box, one side of said box being secured to one face of said beam, the remaining sides of said box being spaced from said beam, two of the sides otsaid box being parallel, one of said parallel sides being secured to said beam, one of the spaced sides ofsaid box having an extension thereon, said extension being secured to anotherface of said beam.

In testimony whereof, I afiix my signature.

WILLIAM H. GRADY. 

